Superheater



July 7, 1936. A. HUET 8 I SUPERHEATER Filed Nov. 15, 1933 INVENTOR ANOKE #06? A ORNEY Patented July 7, 1936 SUPERHEATER Andr Huefllaris, France, assignor to The superheater Company, New York, N. Y.

Application November 15, 1933, Serial No. 698,094 In France April 5, 1933 6 Claims.

The present invention has for its object an improvement in steam superheaters either separately fired or combined with a boiler.

It happens at times when the water level is too high or from some other reason, that water is entrained from the boiler to the superheater. This causes several difiiculties, all of which are well known at present and will not be mentioned in detail.

The improvement forming the object of the present invention has been made with a view to avoiding said difliculties and makes it possible to separate from the saturated steam at its entrance to the superheater any water which it may ments but experiences changes in direction such that the water will be separated from the steam and flows downward along the lowest part of the header without being able to enter the elements, to be subsequently eliminated by suitable means which may be automatic or otherwise.

The description which follows, which is given by way of example and which is to be read in connection with the accompanying drawing, will make it possible to understand in what way the invention can be carried out. In the drawing,

Fig. l is a partial vertical section of a water tube boiler provided with a superheater in accordance with the invention.

Fig. 2 is a partial section on line 2-2 of Fig. 1.

Fig. 3 is a detail viewed from above of the header 6 on the section line 3-3 of Fig. 2.

The boiler illustrated comprises a lower water drum I connected to the steam and water drum 2 by means of tubes of which those which are nearest to the source of heat serve as risers for the water and steam while those further removed serve as return tubes.

Between the last bundle 3 of riser tubes and the first bundle 4 of return tubes there is installed a superheater composed of tubular units 5 connected at their ends to a saturated steam header 6 and a superheated steam header 1. The saturated steam is taken from the drum 2 of the boiler to the header 6 by means of the pipe 8.

The header 6 is preferably somewhat inclined from the vertical. As will be evident from an inspection of Fig. 2, the openings 9 of the header 6 to which the ends of the units 5 are connected are not arranged along the lower side of the header 6, but preferably about degrees from this lower line. It is evident the water in the steam in header 6 will mostly drop to the bottom and so will be prevented, from entering the elements 5 through openings 9; Y p

Baflles H are arranged in header 6', due to the presence of which the steam arriving through the pipe 8 is hindered from flowing directly into the elements 5 but must most of it strike these baflles and will by them be deflected so that the water contained in the steam is separated from it. AS illustrated, the bafiles I I are plates extending longitudinallyof header 6 and arranged to project substantially radially of such header. There are two baifies ll shown, which are fixed-to the inner face of header 6 at their outer edges one on each side of the zone in which the superheater units are attached to the header, but their radial extent is limited so that theydo not meet attheir inner edges and there is a space I la; between such'edg es for steam to pass to units 5. In .order, however, that water may not be carried directly into the space between baflles l I, I prefer to place a cover l lb over them at the ends first encountered by the steam. The water thus separated will necessarily flow along the lower side of the header and accumulate in its lowest part.

In order that this water may be collected without its level ever standing as high as the openings to the lowest units 5, the header 6 may be extended downwardly or may be connected by means of a connector l2 to a water chamber l3 as is shown in the drawing, such chamber being provided with a water level indicator l4 and a blow-off connection I5. This pipe may be either controlled by a blow-ofi cock l6 which can be manually operated whenever this is thought necessary from the indication of the water level indicator l4 or by an automatic blow-off.

Modifications in the detail may be introduced in the invention without necessarily avoiding its spirit. For example, the separation of the water and steam may be made by means of the shape and arrangement of the header 6 itself without use of any baiiles.

I claim: 1. In a superheater; a header; superheater units connected into the side wall of said header in a zone extending longitudinally thereof and located between the uppermost and lowermost portions of said side wall; a supply pipe connecting into said header at one end thereof for admitting saturated steam to said header at a point spaced longitudinally thereof from the inlets of said units; and baflling means extending along p t ons of said side wall; a upply pip 4 necting'into said header atone end thereoi for the lower side of said zone for diverting water carried by the steam away from the inlets of said units. j V

2. In a superheate'r; a header; superheater units connected into'the side wall of said header sin a zone extending longitudinally thereof and located between the uppermost and lowermost admitting saturated" steam to' said header at a 7 point spaced longitudinally thereof from the in; I lets of said units; and bafiiing means extending along either side of said zone for diverting watercarried by the steam away from the inlets offs aid units. or s 3. In a superheater; a headerffsuperheater units connected into the sidewall ofasaid headerin a zone extending longitudinally thereof and located between the uppermost and lowermost portions of said side wall; a supply piperconnect ing intosaidheader at one end thereof for admitting saturated steamto saidheader at a Point spaced longitudinally thereof from the inlets of g said units; bafiling means extending 'alongsaid s the end-portions oi said baffling means;

'zone at either side thereoi for diverting water carried by the steam away from the inlets of said units; andxmeansv associated with: said baffling .means adjacent-the end thereof nearest said, pipe connection for preventing wateiycarried 4 by steamzflowing-along said -header towardssaid inlets being force'dsinto said zone between 4; Ina :superheater;a-header superheater units-connected into the sidewall .of saidiheader int a zone extending longitudinally thereof-and locatedibetween the uppermost and-zlowermost portions ofesaidsside wall a supply pipeconnectingi into; said header at one end'thereoi for ad-} mitting saturated steamto said header'a-t a-point;

spaced longitudinally thereof from-L the inlets l of i said units; a pair of' baffle members extending along said header and projectinginwardly from the interior wall thereof at'either side: of said zone withtheir inner edges spaced toprovide. a

slot therebetween for admitting steam to saidzone and thence to the inlets of said units; and 7 means at the ends oi said members near said supply pipe for closing the space between the end edges of said members to'prevent water entering between the spaced'end edges of said members.

V 5. In a superheater; a header; supe 'rheater units connected into the. side walloi said header f in a 'zone extending longitudinally'thereot and located between the uppermost and lowermost portions of said sidewall; a supply pipe connecting into said header at one endthereof for ad:

inittingsaturated steam to said header at a point 7 spaced longitudinally thereof from the inlets of said units; a pairof bafile members extending along said headerand projecting inwardly from the interior wallthereof at either side of said a slot therebetween for admitting steamto said 7 zone-and thence to the inlets of said units; and

means at the ends of said members near said [zone with'their inner edges spaced to provide supply piperfor; closing the space between-the end 7 edges of fsaidmembers and extending partially 1 along: said inner edges toclose a part'of said slot 6g'In a superheater; an inclined said supply pi'peand located between the upper and lower, inclinedsln'taceportions of said side wall; bafiiingmeans extending along said header ateither side of said zone, said bafiling" means;

acting to. divert-Water carried by steamadmitted to the header away from the inlets or said units and the inclins'tioniof said header causing the water to flow-alongthe lower: inclined surface; thereof; tether-lower end of said header; and

means at'thelower end'of said header for draining the water from: the header. i

ANDRE HUET. 

